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Heym vs Pipelex
Short answer: Pick Heym if you want self-hosted AI workflow orchestration; pick Pipelex if you want declarative AI workflow orchestration. Heym is free; Pipelex is free and open source.
HeymSelf-hosted AI workflow automation — visual canvas, multi-agent & AI Builder
PipelexDeclarative language for repeatable AI workflows (MIT)Which to pick
Pick Heym if you want…
- Self-hosted AI workflow orchestration
- Integrations with OpenAI, Anthropic or Ollama (on Heym's list, not Pipelex's)
Pick Pipelex if you want…
- Declarative AI workflow orchestration
- Integrations with Claude Code, Codex or FastAPI (on Pipelex's list, not Heym's)
Side by side
- What it is
- Heym:Heym is a source-available, self-hosted platform for visual AI workflow automation with multi-agent orchestration.
- Pipelex:Pipelex is a declarative language and Python runtime for building repeatable, agent-first AI workflows that run on any model or provider.
- Best for
- Heym:Self-hosted AI workflow orchestration
- Pipelex:Declarative AI workflow orchestration
- Who it’s for
- Heym:AI, platform, and automation teams that need on-premise workflow control
- Pipelex:Developers building LLM pipelines, AI agents, and chatbot tools.
- Pricing
- Heym:Free
- Pipelex:Open source
- Starting price
- Heym:Free
- Pipelex:Free
- Free plan or trial
- Heym:Free to use
- Pipelex:Free to use
- Open source
- Heym:Yes, 1,300 GitHub stars
- Pipelex:Yes
- Works with
- Heym:OpenAI, Anthropic, Ollama, Cerebras, Google Gemini, OpenRouter, Slack, Discord
- Pipelex:Claude Code, Codex, FastAPI, VS Code, n8n, TypeScript, Python, Docker
Heym features
- Visual drag-and-drop canvas. Design DAG workflows with nodes for triggers, LLMs, agents, logic and integrations.
- AI Assistant. Describe a workflow in plain English and the assistant generates the canvas instantly.
- Multi-agent orchestration. Nest agents up to five levels and run parallel branches for complex tasks.
- Built-in RAG. Semantic search using managed Qdrant vector stores or PostgreSQL pgvector.
- Human-in-the-Loop checkpoints. Add approval steps to pause automation for human review.
- Full observability. Trace execution, view span timelines and token counts for every run.
- Skills system. Create portable capability bundles that agents can reuse across workflows.
- Extensive integrations. Connect to OpenAI, Anthropic, Slack, Discord, Gmail, GitHub, Qdrant, Redis, RabbitMQ, Playwright and many more.
Pipelex features
- Declarative MTHDS language. Write typed AI methods in a Dockerfile/SQL-like syntax that defines steps, inputs, and outputs.
- Agent plugins. Claude Code and Codex plugins let agents design, run, and save methods directly from the IDE.
- Multi-environment execution. Run methods as a chatbot MCP, a webapp, or via API/CLI on any infrastructure.
- Open standard runtime. Pipelex runtime executes methods locally or in Docker, handling model routing and structured output.
- SDKs and integrations. TypeScript (@pipelex/sdk) and Python (pipelex-sdk) clients generate typed calls to the Pipelex API.
- VS Code extension. Provides syntax highlighting, linting, and formatting for .mthds files.
Heym vs Pipelex FAQ
What is the difference between Heym and Pipelex?+
Pipelex offers a declarative language for AI workflows but is not a visual canvas and is MIT-licensed only.
Should I use Heym or Pipelex?+
Pick Heym if you want self-hosted AI workflow orchestration or integrations with OpenAI, Anthropic or Ollama (on Heym's list, not Pipelex's). Pick Pipelex if you want declarative AI workflow orchestration or integrations with Claude Code, Codex or FastAPI (on Pipelex's list, not Heym's).
Is Heym or Pipelex free?+
Yes, both are free, and Pipelex is open source.
Is Heym or Pipelex open source?+
Yes, both are open source: Heym (heymrun/heym on GitHub) and Pipelex.
Do Heym and Pipelex integrate with the same tools?+
Their integration lists don't overlap: Heym lists OpenAI, Anthropic, Ollama, Cerebras and 10 more; Pipelex lists Claude Code, Codex, FastAPI, VS Code and 4 more.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.